The whole purpose of an RSS feed, it seems to me, goes straight to the “trusted system” notion in Getting Things Done — if I have a reliable way of knowing when something really important changes in my world, then I don’t have to think about it when it’s not actually changing, right? And, then, for the less than life-threatening deltas (”new kitty photo!”), it’s probably even okay to just check in every few days or so (cf: “tickler file“).